Optical instrument.



I. MEHALYI.

OPTICAL INSTRUMENT.

APPLICATION FILED Aumzz, 1.9m.

L29@ l?, mented June 5, 1917.

A may be formed upon both muTan sTaTas TaTnnT oTTTcn JOSEPH MIE-IALYI, OF ROCHESTER, NEW YORK, ASSIGNOR T CROVN OPTICAL COM- PAN?, OF ROCHESTER., NEW YORK, A CORPORATION OF NEW YORK.

OPTICAL INSTRUMENT.

Specication of Letters Patent.

Patented J une 5, '1911 7.

Application filed August 22, 1916. Serial No. 116,251.

To all 'av/wm t may concern.'

Be .it known lthat l, JosuPr-r MIHALYna subject of the Emperor` of Austria-Hungary, and resident oi Rochester, in the county ot Monroe and State of New York, have invented certain new and useful nprovements in Optical Instruments, ot which the following is a specification.

The present invention relates to optical instruments and an object ot' the same is to provide a simple and inexpensive mounting for the diopter ring permitting it to be accurately and quickly adjusted to its operative position on the part by which it is carried. Another object ot the invention is to provide for limiting the outward movement of the axially and rotatably mounted tube or sleeve which carries the eye piece, n such a manner that a continuous spiral guide the stationary sleeve and the tube which carries the eye piece while, at the same time, the labor of adjusting such stops will be eliminated.

To these and other ends, the invention consists in certain parts and combinations of parts all ot which will be hereinafter described, the novel features being pointed out in the appended claims.

ln the drawings:

Figure 1 is an axial section through the ocular and the adjacent parts 'of an optical instrument g Fig. 2 is a section on the line 2-2, Fig. 1;

Fig. 3 is a perspective view of the stationary sleeve; and

F ig. et is a perspective view of a diopter ring.

Referring more particularly to the drawings, 5 indicates the eye piece or coular arranged. upon a mounting 8 which is externally threaded near one end to engage intei-nal lthreads 7 on a sleeve 8, the sleeve 8 having' also an internal shoulder 9 for engagement by an external shoulder 10 on the mounting G. rJhe sleeve or tube 8 is mounted to rotate and move axially and, to this end, is Jformed with a spiral rib 11 on its exte 1ior adapted to be engaged between its convolutions by a spiral rib 12 on the interior ot a stationary sleeve 13 which, in this instance, is anchored in a casing 14 of any suitable optical instrument.

rlhe diopter ring 15, which carries indications 16 for cooperation with an index 17 on the stationary sleeve 13, is adjustably mounted on the rotary and axially movable sleeve 8 and to this end the sleeve or tube 8 may be provided beyond the sleeve 13 with an external shoulder 18 for engagement by an inwardly projecting flange 19 on the diopter ring so that the latter may surround the tube or sleeve 13. This ange 19 is engaged by a clamping ring 20 which is internally threaded to engage the external threads 21 on the tube 8. The diopter ring is turned until its Zero point coincides with the index 17 on the stationary casing 13, after which the clamping ring 20 is turned to hold the diopter ring in its adjusted position. A screw 22 is then passed through the clamping ring 20, and the lange 19 and into the sleeve or tube 8 so as to hold the diopter ring and clamping ring in their adjusted positions. An eye cap 23 also engages the threads 21 of the sleeve or tube 8 and has a depending flange 24 surrounding the clamping ring 20 to inclose the latter.

In order to limit the outward movement of the eye piece and the axially movable tube or sleeve 8, two stops 25 and 26 are provided respectively upon the diopter ring and the stationary sleeve 13, these stops being preferably in the form of projections, one on the inner wall of the diopter ring and the other on the outer wall of the stationary sleeve 13. The positions ot' the stops are such that the diopter ring may be rotated freely in either direction to adjust the eye piece to the proper focus of the eye of the user without any cooperation between these two stops, but when the eye piece is turned to a certain point, the stops will engage and prevent the further turning ofthe tube 8 in the-direction of withdrawal from the sleeve 18. The arrangement ot the stops on the diopter ring and the sleeve 13 in the manner claimed permits the two tubes to have their guiding faces continuous on both parts without the liability of being separated or disconnected, and the trouble and time heretofore consumed in adjusting the stopping means is eliminated.

This application contains matter divided from an application tiled by me on the 19th day of April, 1916, Serial No. 92,287.

lWhat I claim as my invention and desire to secure by Letters Patent is:

1. In an optical instrument, a stationary sleeve, a tube rotatably and axially adjustable therein, an eyepiece mounting carried Simi by said tube, a diopter ring adjustable on said tube, a clamping ring for holding the diopter ring in its adjusted position, and an eyeoap piece secured to said tube and covering the clamping ring.

2. In an optical instrument, a stationarysleeve, a tube rotatably and axially movable therein and having an externally threaded portion, and a shoulder at the base of the externally threaded portion, a diopter ring having aninterior iange rotatable on the shoulder of the tube, a Clamping ring engaging said exteriorly threaded portion and said flange on thediopter ring, an eyecap Copiesof this patent may be obtained vfor movement of the rotatably and axially inovable tube.

JOSEPH MIHALYL five cents each, by adressing the Commissioner of Patents,

Washington, DIC. 

